Fiesta 2012

I went every night and I enjoyed most of the acts. I just wonder if the company who was responsible for the fireworks does get paid in full or will they also only receive a 50 % payment ? Regarding the two large generators used for the stage's power supply: why were they running constantly and not just in case of a power cut ? All people present were for many hours exposed to the toxic and carcinogenic substances emitted by these Diesel generators (Diesel exhaust/soot is one of the most carcinogenic substances we know). Why wasn't the stage sound/light system not connected to the mains power supply ? It's not like this event was staged somewhere in the campo.